OK - two things that I believe made a NOTICEABLE difference in the performance of my car:

1) InaZma HyperVoltage System

2) Boulekos Sprint Booster

Both are "plug and play" - easy to install and remove and they will dramatically improve your car!

You can wait on dynos, etc., if you want, but what kind of proof will you accept in the end? There are several on this forum who will question every device and are likely to expire from old age without ever getting "proof" to their liking.

After considering these devices, I decided to take a chance with my own $ and they do WORK!